US3978591A - Compass, in particular for ski and competition track finding - Google Patents

Compass, in particular for ski and competition track finding Download PDF

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Publication number
US3978591A
US3978591A US05/512,927 US51292774A US3978591A US 3978591 A US3978591 A US 3978591A US 51292774 A US51292774 A US 51292774A US 3978591 A US3978591 A US 3978591A
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US
United States
Prior art keywords
compass
strap
thumb
hand
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/512,927
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English (en)
Inventor
Erkki Kalle Jaaskelainen
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Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application granted granted Critical
Publication of US3978591A publication Critical patent/US3978591A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/18—Supporting or suspending compasses, e.g. by gimbal, by flotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/13—Article holder attachable to apparel or body
    • Y10T24/1368—Arm or leg carried holder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/47—Strap-end-attaching devices
    • Y10T24/4782—Watch strap

Definitions

  • the present invention concerns a compass, in particular one intended for use in connection with track finding on skis and in track finding races and which compass is held on the track finder's hand by a strap.
  • Compasses which can be carried on the hand similarly as wristwatches are known in prior art.
  • the necessity of paying attention to the manner in which this motion is carried out detracts from the speed of progress through the terrain and the procedure in itself consumes a certain time.
  • some time will pass until the compass needle becomes stationary and the bearing can be taken.
  • the aim of the present invention is to provide a compass in which the drawbacks mentioned have been virtually completely eliminated.
  • the invention is mainly characterized in that the strap, one end of which has been affixed to the compass, passes slidably through an aperture in the base plate of the compass, thereby forming an adjustable thumb loop, and that the part of the strap projecting from the aperture has such a length that it can be wound around the wrist and the end portion of the strap is attachable to the compass or to the strap by means of a buckle or equivalent so that the compass will be positioned upon the upper edge of the hand adjacent to the thumb notch.
  • the compass according to the invention is affixed upon the upper edge of the hand and adjacent to the thumb notch, the compass can be directly brought into a convenient position for bearing-taking, into the user's field of vision. In track finding on skis the ski staff does not impede the use of the compass in any way, and the compass can be affixed over a skiing glove.
  • the compass according to the figure in the drawing comprises a base plate 1 and upon this a transparent compass needle box 2, inside which a compass needle 3 has been carried on bearings.
  • the needle box 2 is most appropriately fixed and has on its bottom a compass graduation with direction arrow 4, this graduation being counterclockwise, so that when the track is determined to agree with a given bearing, the compass needle 3 is maintained in register with the point of the graduation indicating the desired direction, while the direction arrow 4 points in the direction of travel.
  • the direction arrow 4 will be substantially parallel with the user's thumb.
  • a strap 8 has been attached to the base plate 1 of the compass at the point 5, this strap preferably consisting of an elastic material.
  • the strap 8 passes through an aperture 7 provided in the base plate 1, so that a loop 6 is formed, which is placed around the thumb.
  • the aperture 7 has a shape consistent with the cross section of the strap 8 and it is such that the strap may slide in it with a friction fit, so that the size of the loop 6 is adjustable and the loop 6 can be tightened around the thumb.
  • the part of the strap 8 protruding from the aperture 7 and marked with a in the FIGURE, is of such length that it can be wrapped around the wrist, starting on the inside of the wrist, and that the end portion 8a of the strap 8 can be fixed in connection with the compass or with the strap 8.
  • the compass will hereby be secured upon the upper edge of the hand adjacent to the thumb notch (to the base of the thumb) both by means of the thumb loop 6 and by the wrist loop.
  • a buckle 9 has been schematically shown, which is most appropriately positioned on the loop 6.
  • the buckle 9 will lie adjacent to the aperture 7.
  • the buckle 9, or another equivalent fixing member, may also be affixed to the body of the compass or to the part of the strap marked 8a. It is merely essential that the thumb loop 6 and the wrist loop can be firmly tightened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
US05/512,927 1973-11-06 1974-10-07 Compass, in particular for ski and competition track finding Expired - Lifetime US3978591A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SF3425/73 1973-11-06
FI733425A FI49768C (fi) 1973-11-06 1973-11-06 Kompassi, etenkin hiihto- ja kilpailusuunnistukseen.

Publications (1)

Publication Number Publication Date
US3978591A true US3978591A (en) 1976-09-07

Family

ID=8508423

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/512,927 Expired - Lifetime US3978591A (en) 1973-11-06 1974-10-07 Compass, in particular for ski and competition track finding

Country Status (4)

Country Link
US (1) US3978591A (enrdf_load_stackoverflow)
FI (1) FI49768C (enrdf_load_stackoverflow)
NO (1) NO134816C (enrdf_load_stackoverflow)
SE (1) SE391027B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383374A (en) * 1981-01-05 1983-05-17 Bertero Anthony J Device to determine hair cutting angle
US4425784A (en) 1982-07-22 1984-01-17 Gerolamo Frank D Angle indicator attachable to tube benders and the like
USD297515S (en) 1985-07-01 1988-09-06 Tokyo Compass Company Portable compass
US4932133A (en) * 1989-06-05 1990-06-12 Upward, Inc. Post-avalanche aid device
US5274927A (en) * 1992-11-05 1994-01-04 Michigan Outdoor Products, Inc. Compass apparatus
US5379491A (en) * 1992-12-11 1995-01-10 Solo; Alan J. Mounting means for removably securing functional items to support articles
US20050172504A1 (en) * 2004-02-09 2005-08-11 Ohm Patrick L. Digital display compass for mounting on vehicle rear view mirror
US20070227020A1 (en) * 2006-03-29 2007-10-04 Novatac, Inc. Head-Mounted Navigation System

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390115A (en) * 1888-09-25 Pateiok beenabd delany
US1258919A (en) * 1917-07-02 1918-03-12 Irving R Lederer Safety-clasp for bracelets.
GB124584A (en) * 1918-03-28 1919-03-28 William Wilbraham Phi Falconer Improved Device for Measuring the Range of Movement of Human Joints or the Contraction of Muscles.
US3209464A (en) * 1961-09-28 1965-10-05 Jack E Glatt Navigation instrument
US3484943A (en) * 1967-10-18 1969-12-23 Granville Ted Yarbrough Bricklayer's gauge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390115A (en) * 1888-09-25 Pateiok beenabd delany
US1258919A (en) * 1917-07-02 1918-03-12 Irving R Lederer Safety-clasp for bracelets.
GB124584A (en) * 1918-03-28 1919-03-28 William Wilbraham Phi Falconer Improved Device for Measuring the Range of Movement of Human Joints or the Contraction of Muscles.
US3209464A (en) * 1961-09-28 1965-10-05 Jack E Glatt Navigation instrument
US3484943A (en) * 1967-10-18 1969-12-23 Granville Ted Yarbrough Bricklayer's gauge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383374A (en) * 1981-01-05 1983-05-17 Bertero Anthony J Device to determine hair cutting angle
US4425784A (en) 1982-07-22 1984-01-17 Gerolamo Frank D Angle indicator attachable to tube benders and the like
USD297515S (en) 1985-07-01 1988-09-06 Tokyo Compass Company Portable compass
US4932133A (en) * 1989-06-05 1990-06-12 Upward, Inc. Post-avalanche aid device
US5274927A (en) * 1992-11-05 1994-01-04 Michigan Outdoor Products, Inc. Compass apparatus
US5379491A (en) * 1992-12-11 1995-01-10 Solo; Alan J. Mounting means for removably securing functional items to support articles
US20050172504A1 (en) * 2004-02-09 2005-08-11 Ohm Patrick L. Digital display compass for mounting on vehicle rear view mirror
US6971181B2 (en) * 2004-02-09 2005-12-06 Bell Automotive Products, Inc. Digital display compass for mounting on vehicle rear view mirror
US20070227020A1 (en) * 2006-03-29 2007-10-04 Novatac, Inc. Head-Mounted Navigation System
US7735230B2 (en) * 2006-03-29 2010-06-15 Novatac, Inc. Head-mounted navigation system

Also Published As

Publication number Publication date
NO134816C (enrdf_load_stackoverflow) 1976-12-15
FI49768C (fi) 1975-10-10
SE7413010L (enrdf_load_stackoverflow) 1975-05-07
NO134816B (enrdf_load_stackoverflow) 1976-09-06
FI342573A7 (enrdf_load_stackoverflow) 1975-05-07
NO743942L (enrdf_load_stackoverflow) 1975-06-02
SE391027B (sv) 1977-01-31
FI49768B (enrdf_load_stackoverflow) 1975-06-30

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